Back to stacks
marketing•Updated 10/9/2025

Personalized Marketing Campaign Voice Messages

Mass-scale generation of unique, personalized voice messages for high-conversion marketing.

$0.01 - $0.03 per personalized message2 hours for 10,000 messages

The Problem

Generate thousands of personalized voice messages (e.g., first name inclusion) for an outbound campaign without hiring voice talent.

Expected Outcome

Mass-scale generation of unique, personalized voice messages for high-conversion marketing.

Tool Chain

ElevenLabs
Play.ht

Implementation Steps

  1. 1

    Data Merge (Template & Variables)

    A CSV/database of customer names and personalized variables is merged with the message text template.

  2. 2

    Dynamic TTS Generation

    The TTS API is called in a loop, generating a unique audio file for each recipient using the same custom voice model.

    ElevenLabs
  3. 3

    Quality Check and Volume Normalization

    Automated check for generation errors; all audio files are normalized to a consistent volume level (LUFS).

  4. 4

    Outbound Delivery

    The audio files are delivered via SMS link or direct dial-out service (e.g., Twilio/Vonage).

Alternatives

Step 2Play.ht

Lower per-call cost, but voice models are slightly less nuanced.

Cost Impact: -20%

Step 2

Reliable enterprise performance, good API scaling for mass generation.

Cost Impact: +5%

Export Workflow

Coming Soon

Soon you’ll export this stack to Zapier, n8n, or a starter repo with presets (env vars, webhooks, rate limits).

Get export launch updates